how does this setting affect the plot?

The story involves your basic man vs man , Zaroff vs Rainsford, conflict. The setting is a remote, tropical island in the Caribbean called, (wait for it!) "Ship Trap Island."

THe setting gives this story an exotic over the top feel like those old adventure radio shows in the 1920's.

that title , is double entendre , which gives abad omen to the readers and foreshadows how it will be more epic when the main character seeks by swimming to reach on the rocky shore on the carribean island , however also it demonstrate to the plot that there will be astruggle between asenist and your main character on that island >>> (wait the action )